| 主权项 |
1. A vibration damping device comprising:
a first tubular attachment member coupled to one of a vibration-generating part and a vibration-receiving part and a second attachment member coupled to the other part; an elastic body configured to couple the attachment members to each other; and partition members configured to partition a liquid chamber in the first attachment member in which a liquid is sealed into a first liquid chamber and a second liquid chamber, wherein at least one of the first liquid chamber and the second liquid chamber has the elastic body as a portion of a wall surface, a communicating passage configured to communicate the first liquid chamber with the second liquid chamber is provided in the partition members, flow-changing protrusions protruding inward in a radial direction of the communicating passage and configured to change a flow of the liquid flowing in the communicating passage in an axial direction of the communicating passage are provided in an inner circumferential surface of the communicating passage, the communicating passage and the flow-changing protrusions are formed symmetrically with respect to an axis of the communicating passage when viewed in a longitudinal cross section passing through the axis and the flow-changing protrusions, and projecting ends of the flow-changing protrusions form inner circumferential edges of passing holes which are open toward both sides in the axial direction. |
